Pneumatic-tire pressure gauge



April 6,1926. '1,579,547

H. J. LE VESCONTE PNEUMATI'G TIRE PRESSURE GAUGE Filed Nov. 1v1. 1922 Patented. apr.. 1925 UNiTEDysrA'res EAEOLD J. LE vEsooN'rEjoE CHARLESTON;'WEsTffviEGrNrm Assreivon; rEYircEsiIE ASSIGNMENTS, To 'TIEEGAGE VALVE' COEEORATION;oEcHAELEsToN, WEsfr VIE-- J `GINIA., A CORPORATION yF TESTv VIRGNIA.

. rEEUMATiC-TIEE rEEssUEE GAUGE.

Appnatipnaieanovember 1i, i922. serialy No. 600,419. l

Be it knoivnjthat I, I-I/inoiin J. Ilus ooN'rE, a citizen ot'the United States, residing at Charleston, Vin Athe county ot Kana-Wha andV State ol Test Virginia, have'y invented new and use'tul Improvements in Pneunnatio` Tire Pressure Gauges,of which the tolloW-y ing is a specification. A V:This invention is designedtor impro/ve the construction of Vpneumatic pressure gaugeS in 'thev lnannerto vfacilitate thezassembling oi thesame and to make-the saine more.' certain as against leakage.

'Iheinvention is `illustrated Ain the accom#A panying drawings as folloWsL-f';

Fig'.4 1 shows-a centralsection throughr the gauge. Y n y Fig. 2 a sectionon the line 2-2 in Fig-1L Fig. 3 a section on the line 3 3 in `Fig. 2. Fig. 4 an enlarged section of the base of Vthe gauge. i f

Figs. 5 and 6A alternative con'structions..."Y 1 marks the tirestem sleeve." This is preferably of unitormint'ernal diameter and is externally screw-threaded.k It is screwed into an outwardly opening .socket 2 in a head 3.

A tire tube 4' is vclamped f between the head Sand a. clamping'plate 5. The spreader 6 is provided and the clamping plate and spreader clamped in position by aolamping nut 7. y A plunger 8 is slidingly mounted in the sleeve 1. lThis has an opening 9 extending through it which is controlled an inflation valve 10. The'position'off-K-the plunger in-V dicates the pressure in the valve and a transparent cap 11 is provided for the end of the stem through Which the position of the plunger may be observed. The cap 11 has a glass outer end and a metallic base12, he metallic base beingfscreived on to the lsleeve 1. The usual felloe nut 18 is provided.

A rubber tube 14 is arranged over an eX-V tension 15 on the bottom of the plunger. and secured thereon by a Wrapping 16.-y A.

nipple 17 is provided with a` cone-shaped end 18 which is pressed into a conefshaped` opening 19 in the base 3 and secured there by soldering so as to make an air tight Joint. Y

The ni )ple has an opening 2O through it so that there is aconnectonthrough the plu-neer, tube and nipple to the interior of the tire. The lower end of vthe tube-Mis `the 'plun ger against turning.V

secured to the upper a- Wrappmg 21.

`endot the-.nipple by Aspring 22 is screwed intotlireadsv23 on he end of ythe'plunger and is.screwed-into an' internally screw-threaded nutl '24r 'at its lower end. The nut'risarranged under the endof the sleeve 1 and Clamp'edin the bottom of the lsocket 2'wvhen the sleeve is screivedinto place. f

`, A sleeve-like sl1ell25 is arranged raround l the plunger, `its meeting edges Vbeing sepaslightly 26 {forininga key-Way into I nfhich the"key 27 formed by'indentingtlie yupper end 'of the sleeve .operates to lock gli The sleeve after itis in place'is preferably ysecured by solder. The v.upper end of the spring 22 closes the lower end of the key-Way and .forms 2l stop against which the key 27 operates so as to prevent the escape of thel plunger in `case of injury to the tube and spring.V Theishell 25 iis preferably graduated, the shellfacilitating the forming of ,the scale thereon.

f In'fassembling .the structure the rubber.

tube is bound onthe plunger extension. The yinternally screw-threaded nut 24'. is screwed on to the'lower end Vofthe spring and the spring is screwed overthe plunger.` Thelower end of the tube is pulled free of the spring and secured to the nipple 18,L Vthe ynipple having been previously 'secured inthe head. The 'sleeve 1 is then slipped over thel assembled plunger, spring and tube and screived v`into placein the socketf2, thus Asecurely anchoring andrclamping the nut 24 It 1s locked in the bottom ofuthe socket. in place by any desired method such as indenting, crimping,'or Welding.' The sleeve 25 is then slipped in place, ythe slot 26 permitting it to slide along the key 27 andv when rbrought yto itsydesired position is se.-

cured by soldering. Y

In the alternative construction the nipple 17 hasv a screw-threaded end 18a which is screwed into an opening '19a and in the con,-

the combination of a sleeve externally screwthreaded; a head having a screw-threaded outwardly-1 openingV socket into which the sleeve 1e screwed a plunger slidingly mounted in the sleeYe; a if'alvein the plunger; a tube Connecting the plungerI with the interior of the gauge; a spring resisting the movement of the plunger7 said plunger, tube and spring being adapted to be assembled in the socket and secured therein by screwing into the socket the serew-threaded sleeve; a shell secured on the plunger .having its edges separated 'forming a key-way, said shell being insertable between the sleeve and plunger after the assembly of the sleeve and head; and a key 'on the sleeve extending into the key-Way. y Y

2. In a pneumatic tire pressure gauge, the combination ofl a stem sleeve; a sl iding plunger in the sleeve; a spring arranged over the end ot' the plunger and resisting its movement; a graduated metallic shell arranged over the plunger having its edges slightly separated forming a key-Way, one end of the key-Way being Closed by the spring; and a key on the sleeve extending into the key-Way, the spring forming a stop in connection with the key.

3. In a pneumatie tire pressure gauge, the combination 'of a sleeve. externally screwthreaded; a head having a screw-threaded outwardly opening socket into which the sleeve is screwed; a plimgei1 slidingly mount4 ed in the sleeve; a Valve in the plunger; a tube connecting the plunger` with the interior of the gauge; a spring resisting the movement of the plunger, said plunger7 tube and spring' being adapted to be assembled in the socket and. secured therein by screwing into thesoeket the sereuf'tln'eaded sleeve; a shell secured on the vplunger having its edges separated forming a key-way, said shell being insertable between the sleeve and plunger after the assembly of the sleeve and head; a key lon the sleeve extending into the key-Way; and a nut screwed on to the inner end of the spring and anchored in the head by the assembling ol the sleeve in the socket.

In testimony whereof I have hereunto set my hand. I

HAROLD J. LE VESCGNTE. 

